This is book number 3 in the Dreams of Fire and Gods series.
Dreams of Fire and Gods: Book Three
Long ago, two factions of gods, the Stronni and the Taaweh, nearly destroyed the Kingdom of Dasak in a great war. The Taaweh vanished when their queen was imprisoned, and the Stronni declared victory. A thousand years later, a young nobleman named Sael and his lover Koreh have rescued the Taaweh queen. In the process Koreh was killed, and now an injured Sael struggles to heal from both injuries and grief. Unknown to him, Koreh embarks on a journey across the land of the dead, trying to make his way back to Sael—and to life. But time moves differently in the underworld, and decades pass while Koreh travels.
In the living world, tensions between the emperor and Sael’s father, Vek Worlen, who is regent of the eastern kingdom, have soured beyond repair. Worlen conspires with the assassin Donegh to break into the imperial palace and challenge the emperor to a duel to the death. But the goddess Imen has chosen a young priest named Gonim as her champion. Through him she discovers the Taaweh have returned, and her enraged king threatens to destroy Dasak and all its human inhabitants. Sael must save his world, must confront the gods and persuade them not to destroy humankind. But it seems hopeless. If only Koreh were at his side…